简介：Themodulationandcontrolofgecko'sfootmovementswerestudiedelectrophysiologicallyinordertodesignthemotorcontrolsystemofagecko-mimicrobot.Inthisstudy(1)theanatomyoftheperipheralnervescontrollingthegecko'sfootmovementswasdetermined;(2)therelationshipbetweenthelimbnervesofthegeckoanditsfootmotorpatternswasstudied;(3)theafferentimpulsesofthenervesevokedbyrubbingthegecko'stoesandpalmwererecorded;(4)copyingthenaturalpatternsofmovementofthegecko'sfoot(abduction,adduction,flexion,andrevolution)anditslimbnervemodulationandcontrolmechanism,thenerveswerestimulatedundercomputercontrol,andtheresultsrecordedbyCCD.Resultssuggestthatgecko'sfootmovementscanbesuccessfullycontrolledbyartificialelectricalsignals.

简介：

简介：乙肝病毒前S1抗原含多个免疫优势表位及乙肝病毒肝细胞受体结合位点,具有重要的生物学功能.为使其高效、可溶性表达,在DnaStar软件辅助分析下,将前S1基因5′端复杂二级结构突变后,克隆入原核表达载体pQE-30a,转化大肠杆菌M15感受态细胞,经IPTG诱导后,获得了高水平、可溶性表达;并对其进行了纯化和鉴定,为进一步研究乙肝病毒前S1抗原的结构功能特点奠定了基础.